Added WidgetMerger, Polyline - colors support for each point independently, simple widgets now compute color array instead of setting global color

* BruteForceNonLocalMeans
* OpticalFlowBM

* out of border access in edgesHysteresisLocalKernel
* incorrect usage of atomicAdd

This reverts commit dbce9069.

This reverts commit 33d42b74.

This reverts commit 952027a8.

This reverts commit e91bf95d.

EMBED_CUDA and FORCE_EMBED_OPENCV flags added to cmake macro add_android_project;
INSTALL_CUDA_LIBRARIES option added to OpenCV.mk
opencv_dynamicuda library installation with enabled OPENCV_INSTALL_MODULES flag fixed;
CUDA initialization apportunity added to OpenCVLoader.initDebug();
Tutorial-4-CUDA sample reimplemented with static OpenCV and CUDA initialization.